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Finding the Fourth Proportional to 647,907.80, 971,861.70 and 310,891.10

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Solution

The fourth proportional to 647,907.80, 971,861.70 and 310,891.10 is: 466,336.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,907.80 : 971,861.70 = 310,891.10 : x
  2. Step 2: Convert to fraction form
    647,907.80/971,861.70 = 310,891.10/x
  3. Step 3: Cross multiply
    647,907.80x = 971,861.70 × 310,891.10
  4. Step 4: Simplify right side
    647,907.80x = 302,143,152,960.87
  5. Step 5: Solve for x
    x = 302,143,152,960.87/647,907.80
  6. Step 6: Final answer
    x = 466,336.65

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.